Modular Sofa with Pull-Out Bed and Tool-Free Assembly

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing modular sofas lack flexibility, combining sofa and bed functions, exceed package size limits, require additional tools for assembly, and lack storage solutions, particularly inconvenient for small apartments.

Innovation Solution

A modular sofa design incorporating detachable modules such as a pull-out sofa bed, corner seat, ottoman, and love seat, connected by various types of connecting members, allowing conversion between sofa and bed functions, optimized for transportation, and featuring integrated storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a traditional modular sofa is designed with fixed combination form, then structural stability is improved, but flexibility and adaptability deteriorate

Engineering Contradiction:

Improvestructural stabilityVSAvoidflexibility

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The sofa is divided into multiple detachable modules including single seat modules, corner seat modules, ottoman modules, love seat modules, and pull-out sofa bed modules. Each module can be independently connected or disconnected through connecting members, allowing the sofa structure to be reconfigured according to different needs while maintaining stability during use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sofa transitions from a static fixed structure to a dynamic reconfigurable structure. The connecting members enable modules to be easily assembled and disassembled, allowing the sofa to adapt between different configurations (single seat, double seat, corner arrangement) and functions (sofa, bed) while maintaining structural integrity during each configuration.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a modular sofa integrates sofa and bed functions, then versatility is improved, but size and transportation complexity worsen

Engineering Contradiction:

Improvedual function capabilityVSAvoidpackage size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The pull-out sofa bed module integrates both sofa and bed functions in a single unit. The module includes a base portion, backrest portion, and pull-out portion that can be extended to form a bed or retracted to form a sofa. This eliminates the need for separate sofa and bed furniture, reducing overall space requirements and transportation complexity while providing dual functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The pull-out portion of the sofa bed module is stored within the base portion when not in use. The bed-forming components are nested inside the sofa structure, allowing the module to maintain a compact sofa configuration during transportation while expanding to full bed size when needed.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If a modular sofa requires additional tools for assembly, then connection reliability is improved, but ease of operation deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidassembly difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The connecting members are designed to be easily operated by users without requiring additional tools. The connection structure includes inserting slots and inserting heads that can be manually assembled by simply pushing the modules together, allowing users to complete assembly themselves while maintaining reliable connections through the interlocking design.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The complex tool-based connection mechanisms are extracted and replaced with simple manual connection systems. The connecting members use straightforward inserting slots and heads that eliminate the need for screws, bolts, or other tools, while still providing sufficient connection reliability through the interlocking geometry and friction fit.

Inventive Principle:

Principle #2Taking out (Extraction)

4Device complexity

If a modular sofa is designed without storage space, then structural simplicity is improved, but adaptability to small apartments deteriorates

Engineering Contradiction:

Improvestructural simplicityVSAvoidsuitability for small apartments

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

Storage functionality is merged with the ottoman module and base portions of the sofa. The ottoman module includes a storage chamber accessible through an opening in the top surface, allowing users to store items directly within the sofa structure. This integrates storage capacity into the existing modular design without adding separate storage furniture, maintaining structural simplicity while providing essential storage for small apartment environments.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12414633B1Modular sofa

Publication Date: 2025.09.16 VOSSON INC

AI summary

The present invention provides a modular sofa includes: at least one pull-out sofa bed module, and at least one module of a single seat module, a corner seat module, an ottoman module, and a love seat module. Various modules are connected to each other through a second type of connecting member. The pull-out sofa bed module includes a second base portion, a second backrest portion, and a pull-out portion, where the second backrest portion is configured to provide leaning support for a user, the pull-out portion may be extended and retracted relative to the second base portion, when the pull-out portion is pulled into the second base portion, the pull-out sofa bed module is used as a sofa, and when the pull-out portion is pulled out of the second base portion, the pull-out sofa bed module is used as a sofa bed.